Access the x, y, z, w components using [0], [1], [2], [3] respectively.
var p : Vector4;
p[3] = 5; // the same as p.w = 5
using UnityEngine;
using System.Collections;
public class example : MonoBehaviour {
public Vector4 p;
void Example() {
p[3] = 5;
}
}
import UnityEngine
import System.Collections
class example(MonoBehaviour):
public p as Vector4
def Example():
p[3] = 5